MAX3223EEAP-T

Overview

The MAX3223EEAP-T is a dual RS-232 transceiver from the MAX3221E/MAX3223E/MAX3243E family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and supports data rates up to 250kbps. The device features two drivers and two receivers with full-duplex communication capability. It incorporates an AutoShutdown feature that reduces supply current to 1µA when no valid signal is detected. ESD protection is rated at ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). It is housed in a 20-pin SSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown technology automatically disables charge pumps and drivers to achieve ultra-low 1µA standby current when the RS-232 cable is disconnected or peripheral transmitters are off.
• Integrated dual charge pump generates internal +5.5V and -5.5V supplies from a single low-voltage source using only four small capacitors.
• Enhanced I/O protection withstands ±15kV electrostatic discharge via Human Body Model and ±15kV air-gap discharge without latch-up.

Applications

• Notebook, subnotebook, and palmtop computers
• Battery-powered handheld equipment and cellular phones
• Peripherals such as printers and modems

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm the 'EE' designation matches the required industrial temperature range (-40°C to +85°C). Ensure the 'AP' code corresponds to the 20-pin SSOP physical footprint for PCB layout compatibility.

Selection Notes

Select this component for applications requiring minimal power consumption during idle states. The integrated charge pump eliminates the need for external negative voltage generators. Verify that the 250kbps maximum data rate meets system timing requirements.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E series of 3V-powered RS-232 transceivers. The MAX3223E variant specifically provides two drivers and two receivers, distinguishing it from the single-channel MAX3221E and the multi-channel MAX3243E.

Replacement Considerations

MAX3223ECAP+ (Commercial grade, 0°C to +70°C)

FAQ

How does the AutoShutdown feature reduce power consumption?

When valid RS-232 signal levels are not detected on any receiver input for 30µs, the internal logic shuts off the charge pumps and drivers, reducing supply current to 1µA.

What capacitor values are required for 3.3V operation?

For a +3.3V supply, the datasheet specifies using 0.1µF capacitors for C1 through C4.